TY - BOOK AU - Leftwich, Richard H TI - An introduction to economic thinking SN - 0-03-069495-7 AV - HB 171.5 L375 PY - 1969/// CY - New York PB - Holt Rinehart and Wiston KW - EconomĂ­a N1 - Incluye bibliografĂ­a ER -